White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, OR was 30.01% in January of 2022, according to the United States Federal Reserve. Historically, White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, OR reached a record high of 35.58 in January of 2020 and a record low of 23.28 in January of 2015. Trading Economics provides the current actual value, an historical data chart and related indicators for White to Non-White Racial Dissimilarity (5-year estimate) Index for Polk County, OR - last updated from the United States Federal Reserve on May of 2024.